Rear bumper for an automobile



FIG. 1 is a first perspective view of a rear bumper for an automobile, showing my new design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a right side elevational view thereof; and,

FIG. 8 is a left side elevational view thereof.

The ghosted or low contrasted structures in the drawings illustrate portions of the rear bumper for an automobile that form no part of the claimed design. 

CLAIM The ornamental design for a rear bumper for an automobile, as shown and described. 